CNC Machined Part

CNC machined parts are widely used across industries such as automotive, aerospace, medical devices, and industrial machinery, serving as structural brackets, housings, shafts, and custom fittings. They are specified by engineering drawings that define dimensions, tolerances, surface finish, and material grade. Grades are distinguished by material selection (e.g., aluminum 6061-T6 vs. stainless steel 316L), tolerance classes (e.g., ISO 2768-m vs. ISO 2768-f), and surface treatments (e.g., anodizing, passivation). The manufacturing process ensures high repeatability and accuracy, making them ideal for both prototyping and mass production. Typical materials include aluminum 6061-T6, stainless steel 304/316L, brass C36000, titanium Grade 5 (Ti-6Al-4V), carbon steel 1018/1045, and plastics such as POM and PTFE. Key parameters include dimensional tolerance (ISO 2768-m, ±0.05 mm), surface roughness (Ra 0.8–3.2 μm), part size range (10–500 mm), material hardness (HRC 20–60), yield strength (250–1100 MPa), operating temperature range (-40 to 300 °C), thread size (M2–M20), flatness (0.05 mm), perpendicularity (0.05 mm), surface treatments (anodizing, passivation, powder coating), and inspection methods (CMM, calipers, micrometers). Relevant standards include ISO 2768-1, ISO 2768-2, ASTM B211, ASTM A276, ISO 1302, and GB/T 1804. Always verify model-specific values and standards with the legal manufacturer or supplier.

CNC machining removes material from a solid block (workpiece) using rotating cutting tools controlled by a computer program. The machine follows precise tool paths to achieve the desired shape, dimensions, and surface finish. The physical behavior involves cutting forces, heat generation, and chip formation, which are managed by selecting appropriate cutting parameters and coolants to maintain accuracy and tool life.